feat(connector): [CYBERSOURCE] add integrity check support for Authorize, PSync, Refund, and RSync flows

[Hariharanpugazh]

Type of Change

• New feature

Description

This PR adds Integrity Check support for the Cybersource connector across the following payment flows:

• Authorize
• Payment Sync (PSync)
• Refund
• Refund Sync (RSync)

The integrity check ensures that the amount and currency values returned by the connector match the values originally sent in the request. This verification helps maintain transaction accuracy and consistency between Hyperswitch and the connector.

Key Implementation Details

• Added calls to the appropriate integrity helper functions from crates/hyperswitch_connectors/src/utils.rs:

  • get_authorise_integrity_object
  • get_sync_integrity_object
  • get_refund_integrity_object
  • get_capture_integrity_object (where applicable)

• Attached the generated integrity object to each flow’s request before returning the response.

• Ensured compatibility across both v1 and non-v1 feature flags.

• Verified code formatting, linting, and successful build checks.

Additional Changes

• None.

Motivation and Context

Integrity checks are critical to prevent data mismatches and ensure reliable reconciliation between Hyperswitch and external connectors.
This feature aligns Cybersource with other connectors (like Adyen, Stripe, and Razorpay) that already support similar validation.

Fixes: #9165

How did you test it?

• Hardcoded mismatched amount and currency values locally to trigger and verify integrity check errors.
• Ran cargo check, cargo +nightly fmt --all, and cargo clippy to confirm code quality and correctness.

Checklist

• I formatted the code using cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed and tested all flows locally
• All GitHub checks pass successfully

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Changed Files

File	Status
crates/hyperswitch_connectors/src/connectors/cybersource.rs	17% smaller